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diff --git a/include/asm-arm/arch-omap/omap-alsa.h b/include/asm-arm/arch-omap/omap-alsa.h
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1/*
2 * linux/include/asm-arm/arch-omap/omap-alsa.h
3 *
4 * Alsa Driver for AIC23 and TSC2101 codecs on OMAP platform boards.
5 *
6 * Copyright (C) 2006 Mika Laitio <lamikr@cc.jyu.fi>
7 *
8 * Copyright (C) 2005 Instituto Nokia de Tecnologia - INdT - Manaus Brazil
9 * Written by Daniel Petrini, David Cohen, Anderson Briglia
10 * {daniel.petrini, david.cohen, anderson.briglia}@indt.org.br
11 *
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by the
14 * Free Software Foundation; either version 2 of the License, or (at your
15 * option) any later version.
16 *
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
20 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
23 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
24 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * You should have received a copy of the GNU General Public License along
29 * with this program; if not, write to the Free Software Foundation, Inc.,
30 * 675 Mass Ave, Cambridge, MA 02139, USA.
31 *
32 * History
33 * -------
34 *
35 * 2005/07/25 INdT-10LE Kernel Team - Alsa driver for omap osk,
36 * original version based in sa1100 driver
37 * and omap oss driver.
38 */
39
40#ifndef __OMAP_ALSA_H
41#define __OMAP_ALSA_H
42
43#include <asm/arch/dma.h>
44#include <sound/core.h>
45#include <sound/pcm.h>
46#include <asm/arch/mcbsp.h>
47#include <linux/platform_device.h>
48
49#define DMA_BUF_SIZE (1024 * 8)
50
51/*
52 * Buffer management for alsa and dma
53 */
54struct audio_stream {
55 char *id; /* identification string */
56 int stream_id; /* numeric identification */
57 int dma_dev; /* dma number of that device */
58 int *lch; /* Chain of channels this stream is linked to */
59 char started; /* to store if the chain was started or not */
60 int dma_q_head; /* DMA Channel Q Head */
61 int dma_q_tail; /* DMA Channel Q Tail */
62 char dma_q_count; /* DMA Channel Q Count */
63 int active:1; /* we are using this stream for transfer now */
64 int period; /* current transfer period */
65 int periods; /* current count of periods registerd in the DMA engine */
66 spinlock_t dma_lock; /* for locking in DMA operations */
67 struct snd_pcm_substream *stream; /* the pcm stream */
68 unsigned linked:1; /* dma channels linked */
69 int offset; /* store start position of the last period in the alsa buffer */
70 int (*hw_start)(void); /* interface to start HW interface, e.g. McBSP */
71 int (*hw_stop)(void); /* interface to stop HW interface, e.g. McBSP */
72};
73
74/*
75 * Alsa card structure for aic23
76 */
77struct snd_card_omap_codec {
78 struct snd_card *card;
79 struct snd_pcm *pcm;
80 long samplerate;
81 struct audio_stream s[2]; /* playback & capture */
82};
83
84/* Codec specific information and function pointers.
85 * Codec (omap-alsa-aic23.c and omap-alsa-tsc2101.c)
86 * are responsible for defining the function pointers.
87 */
88struct omap_alsa_codec_config {
89 char *name;
90 struct omap_mcbsp_reg_cfg *mcbsp_regs_alsa;
91 struct snd_pcm_hw_constraint_list *hw_constraints_rates;
92 struct snd_pcm_hardware *snd_omap_alsa_playback;
93 struct snd_pcm_hardware *snd_omap_alsa_capture;
94 void (*codec_configure_dev)(void);
95 void (*codec_set_samplerate)(long);
96 void (*codec_clock_setup)(void);
97 int (*codec_clock_on)(void);
98 int (*codec_clock_off)(void);
99 int (*get_default_samplerate)(void);
100};
101
102/*********** Mixer function prototypes *************************/
103int snd_omap_mixer(struct snd_card_omap_codec *);
104void snd_omap_init_mixer(void);
105
106#ifdef CONFIG_PM
107void snd_omap_suspend_mixer(void);
108void snd_omap_resume_mixer(void);
109#endif
110
111int snd_omap_alsa_post_probe(struct platform_device *pdev, struct omap_alsa_codec_config *config);
112int snd_omap_alsa_remove(struct platform_device *pdev);
113#ifdef CONFIG_PM
114int snd_omap_alsa_suspend(struct platform_device *pdev, pm_message_t state);
115int snd_omap_alsa_resume(struct platform_device *pdev);
116#else
117#define snd_omap_alsa_suspend NULL
118#define snd_omap_alsa_resume NULL
119#endif
120
121void callback_omap_alsa_sound_dma(void *);
122
123#endif